Short Answer 
The total cost for 10 one-pound packs of wall putty is $30, while a ten-pound pack costs $24, resulting in savings of $6. This translates to a percentage savings of 20% when comparing the more expensive option’s cost.
Calculate Total Cost
First, determine the total cost of purchasing multiple one-pound packs of wall putty. If each one-pound pack costs $3, then for 10 packs, you will calculate:
- Price for one pound pack: $3
- Quantity: 10
- Total cost = 3 * 10 = $30
Determine Savings
Next, compare the cost of buying one large ten-pound pack to the total cost of the smaller packs. The ten-pound pack is priced at $24. To find the savings:
- Total cost of one-pound packs: $30
- Cost of one ten-pound pack: $24
- Savings = $30 – $24 = $6
Calculate Percent Savings
Finally, calculate the percentage savings based on the money saved and the cost of the more expensive option. You will divide the savings by the cost of the ten one-pound packs:
- Amount saved: $6
- More expensive option cost: $30
- Percent savings = $6 / $30 = 0.2 (or 20%)